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| Solids: Thermodynamics and Bonding |
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Among
the bonding types, Ionic, Metallic, and van der Waals bonds are non-directional
and depend only on the interatomic separation.
· Covalent and Hydrogen bonds are directional, and an angular distortion increases the energy of the system. · The effect of changing bond angle is illustrated for the HCN molecule. The effect of changing R is also shown on this potential diagram. · In general, more than one bonding type will play a role in the cohesion of most solids. |
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| From: Carpenter, "Reaction Dynamics in Organic Chemistry," American Scientist (March 1997) 139 | |||||||||||||||